.main .banner {
  width: 100%;
  height: 600px;
}
.main .banner img {
  width: 100%;
  height: 600px;
}
.main .class-list {
  display: flex;
  width: 1200px;
  height: 278px;
  border-bottom: 1px solid #e4e7eb;
}
.main .class-list .item-class {
  width: 300px;
  height: 278px;
  padding-top: 60px;
  text-align: center;
}
.main .class-list .item-class img {
  width: 120px;
  height: 120px;
}
.main .class-list .item-class h3 {
  font-size: 24px;
  font-weight: 400;
  margin-top: 30px;
  letter-spacing: 0px;
  line-height: 28.13px;
  color: #333333;
}
.main .teacher {
  width: 1200px;
  padding-bottom: 150px;
}
.main .teacher .teacher-list {
  display: flex;
  margin-top: 20px;
  width: 100%;
  height: 244px;
  padding: 50px 40px;
  opacity: 1;
  border-radius: 20px;
}
.main .teacher .teacher-list img {
  width: 164px;
  height: 164px;
  border-radius: 50%;
}
.main .teacher .teacher-list .introduction {
  margin-left: 50px;
}
.main .teacher .teacher-list .introduction h4 {
  font-size: 22px;
  font-weight: 400;
  letter-spacing: 0px;
  line-height: 25.78px;
  color: #333333;
}
.main .teacher .teacher-list .introduction h4 span {
  font-size: 16px;
  font-weight: 400;
  letter-spacing: 0px;
  line-height: 18.75px;
  color: #666666;
}
.main .teacher .teacher-list .introduction .detail {
  font-size: 16px;
  font-weight: 400;
  margin-top: 20px;
  letter-spacing: 2px;
  line-height: 24px;
  color: #333333;
}
.main .teacher .teacher-list:hover {
  background-color: #1842b6;
}
.main .teacher .teacher-list:hover h4,
.main .teacher .teacher-list:hover .detail {
  color: #fff;
}
.main .teacher .teacher-list:hover h4 span,
.main .teacher .teacher-list:hover .detail span {
  color: #fff;
}
